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  <title>Convert domain name from IDNA ASCII to Unicode</title>
 </head>
 <body class="docs"><div id="layout">
  <div id="layout-content"><div id="function.idn-to-utf8" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">idn_to_utf8</h1>
  <p class="verinfo">(PHP 5 &gt;= 5.3.0, PHP 7, PECL intl &gt;= 1.0.2, PECL idn &gt;= 0.1)</p><p class="refpurpose"><span class="refname">idn_to_utf8</span> &mdash; <span class="dc-title">Convert domain name from IDNA ASCII to Unicode</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.idn-to-utf8-description">
  <h3 class="title">说明</h3>
  <p class="para">过程化风格</p>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>idn_to_utf8</strong></span>
    ( <span class="methodparam"><span class="type">string</span> <code class="parameter">$domain</code></span>
   [, <span class="methodparam"><span class="type">int</span> <code class="parameter">$options</code><span class="initializer"> = IDNA_DEFAULT</span></span>
   [, <span class="methodparam"><span class="type">int</span> <code class="parameter">$variant</code><span class="initializer"> = INTL_IDNA_VARIANT_UTS46</span></span>
   [, <span class="methodparam"><span class="type">array</span> <code class="parameter reference">&$idna_info</code></span>
  ]]] ) : <span class="type">string</span></div>

  <p class="para rdfs-comment">
   This function converts a Unicode domain name from an IDNA ASCII-compatible format to plain Unicode, encoded in UTF-8.
  </p> 
  </div>


 <div class="refsect1 parameters" id="refsect1-function.idn-to-utf8-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<code class="parameter">domain</code></dt>

     <dd>

      <p class="para">
       Domain to convert in an IDNA ASCII-compatible format.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">options</code></dt>

     <dd>

      <p class="para">
       Conversion options - combination of IDNA_* constants
       (except IDNA_ERROR_* constants).
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">variant</code></dt>

     <dd>

      <p class="para">
       Either <strong><code>INTL_IDNA_VARIANT_2003</code></strong> for IDNA 2003 or
       <strong><code>INTL_IDNA_VARIANT_UTS46</code></strong> for UTS #46.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">idna_info</code></dt>

     <dd>

      <p class="para">
       This parameter can be used only if
       <strong><code>INTL_IDNA_VARIANT_UTS46</code></strong> was used for
       <code class="parameter">variant</code>. In that case, it will be filled with an
       array with the keys <em>&#039;result&#039;</em>, the possibly illegal
       result of the transformation,
       <em>&#039;isTransitionalDifferent&#039;</em>, a boolean indicating
       whether the usage of the transitional mechanisms of UTS #46 either has
       or would have changed the result and <em>&#039;errors&#039;</em>,
       which is an <span class="type"><a href="language.types.integer.html" class="type int">int</a></span> representing a bitset of the error
       constants IDNA_ERROR_*.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.idn-to-utf8-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   The domain name in Unicode, encoded in UTF-8,  或者在失败时返回 <strong><code>FALSE</code></strong>
  </p>
 </div>


 <div class="refsect1 changelog" id="refsect1-function.idn-to-utf8-changelog">
  <h3 class="title">更新日志</h3>
  <p class="para">
   <table class="doctable informaltable">
    
     <thead>
      <tr>
       <th>版本</th>
       <th>说明</th>
      </tr>

     </thead>

     <tbody class="tbody">
      <tr>
       <td>7.4.0</td>
       <td>
        The default value of <code class="parameter">variant</code> is now
        <strong><code>INTL_IDNA_VARIANT_UTS46</code></strong> instead of the deprecated
        <strong><code>INTL_IDNA_VARIANT_2003</code></strong>.
       </td>
      </tr>

      <tr>
       <td>7.2.0</td>
       <td>
        <strong><code>INTL_IDNA_VARIANT_2003</code></strong> has been deprecated; use
        <strong><code>INTL_IDNA_VARIANT_UTS46</code></strong> instead.
       </td>
      </tr>

      <tr>
       <td>5.4.0/PECL 2.0.0b1</td>
       <td>
        Added the parameters <code class="parameter">variant</code> and
        <code class="parameter">idna_info</code>; UTS #46 support (requires ICU ≥ 4.6).
       </td>
      </tr>

     </tbody>
    
   </table>

  </p>
 </div>

 
 <div class="refsect1 examples" id="refsect1-function.idn-to-utf8-examples">
  <h3 class="title">范例</h3>
  <div class="example" id="example-3103">
   <p><strong>Example #1 <span class="function"><strong>idn_to_utf8()</strong></span> example</strong></p>
   <div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /><br /></span><span style="color: #007700">echo&nbsp;</span><span style="color: #0000BB">idn_to_utf8</span><span style="color: #007700">(</span><span style="color: #DD0000">'xn--tst-qla.de'</span><span style="color: #007700">);&nbsp;<br /><br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
   </div>

  </div>
  <p class="para">以上例程会输出：</p>
  <div class="example-contents screen">
<div class="cdata"><pre>
täst.de
</pre></div>
  </div>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.idn-to-utf8-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="idn_to_ascii.html" class="function" rel="rdfs-seeAlso">idn_to_ascii()</a> - Convert domain name to IDNA ASCII form</span></li>
   </ul>
  </p>
 </div>

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